You are invited to join the next talk in the
Cambridge SPSS talk series
online on Wednesday 11 March 2026, 15:00-16:00
UK time.
Title:
Representative Ranking for Deliberation in the Public Sphere
Abstract:
Online comment sections, such as those on news sites or social media,
can foster informal public deliberation. However, this potential is
often undermined by toxic or low-quality exchanges. To combat this,
platforms increasingly leverage algorithms to facilitate
higher-quality discussions, e.g., by using civility classifiers or
forms of prosocial ranking. Yet, these interventions may also
inadvertently reduce the visibility of legitimate viewpoints,
undermining a key aspect of deliberation: representation of diverse
views. This paper adopts the notion of justified representation (JR)
from the social choice literature and incorporates a JR constraint into
algorithms for ranking comments. We find that enforcing JR leads to
greater inclusion of diverse viewpoints while still
being compatible with optimizing for user engagement or other measures
of conversational quality. This is joint work with Smitha Milli, Tyler
Lu, Jamelle Watson-Daniels and Max Nickel.